Shrub rose plant named ‘KORcasima’

ABSTRACT

A new and distinct variety of rose with long lasting, novel red flowers, and attractive foliage with good disease resistance. It exhibits bushy growth with abundant flowers. The new variety propagates well from cuttings and by grafting. This new and distinct variety has shown to be uniform and stable in the resulting generations from asexual propagation.

Latin name of genus and species: The botanical classification of the newrose plant is Rosa hybrida.

Variety denomination: The denomination of the new variety is‘KORcasima’.

BACKGROUND OF THE INVENTION

The new variety of rose plant of the present invention originated from acontrolled crossing in a breeding program of two distinct parents duringthe summer of 2002. The crossing was between an ‘un-named seedling’ and‘Insel Mainau’.

The resulting seeds were planted during the following winter. Theresulting seedlings were evaluated and exhibited distinctive physicaland biological characteristics. The new rose plant was selected as asingle plant from the seedling beds due to its superior characteristicsand asexually propagated for further evaluation. This new anddistinctive rose variety is named ‘KORcasima’.

SUMMARY OF THE INVENTION

The new rose plant may be distinguished from its seed parent, an‘un-named seedling’, by the following combination of characteristics:

-   -   1. The flower size of the ‘un-named seedling’ is small, while        the flower size of ‘KORcasima’ is medium to large.    -   2. The petal count of the ‘un-named seedling’ is semi-double,        while the petal count of ‘KORcasima’ is very double.

The new rose plant may be distinguished from its pollen parent, an‘Insel Mainau’ by the following combination of characteristics:

-   -   1. The disease resistance of ‘Insel Mainau’ is poor, while the        disease resistance of ‘KORcasima’ is good.    -   2. The height of ‘Insel Mainau’ is 40–50 cm, while the height of        ‘KORcasima’ is 70–80 cm.

The objective of the hybridization was to create a new and distinct roseplant with unique qualities, such as:

-   -   1. Compact and uniform growth and flowering; when grown as a        plant from cuttings;    -   2. Abundant attractive, recurrent flowers;    -   3. Attractive and abundant foliage; and    -   3. Resistance to diseases encountered in landscapes and gardens.

This combination of qualities is not present in prior rose cultivars.These objectives have been substantially achieved and in thatdistinguish ‘KORcasima’ from all other varieties of which we are aware.

As part of a rose development program, Wilhelm Kordes germinated seedsfrom the aforementioned hybridization and conducted evaluations andobservations on the resulting seedlings in a controlled environment inOffenseth-Sparrieshoop, Germany. The resulting seedlings exhibiteddistinctive physical and biological characteristics. The new rose plant‘KORcasima’ was selected in May, 2003 from the seedling beds to beasexually propagated for further evaluation. The first asexualpropagation of ‘KORcasima’ was done by budding to seedling understocksin July, 2003 at the inventor's nursery in Offenseth-Sparrieshoop,Germany.

This initial and other subsequent propagations conducted in controlledenvironments demonstrate that ‘KORcasima’ reproduces true to type insuccessive generations of asexual reproduction.

BRIEF DESCRIPTION OF THE DRAWING

The accompanying color illustration shows as true as is reasonablypossible to obtain in color photographs of this type, the typicalcharacteristics of the buds, flowers, leaves, and stems of ‘KORcasima’.

Specifically illustrated in SHEET ONE is a stem exhibiting thorns; tightbud and open flower bloom; juvenile foliage and tip of stem; dissectedreceptacle and detached sepal; and leaves.

DETAILED BOTANICAL DESCRIPTION

The following is a description of ‘KORcasima’, as observed in its growthin August, 2008 in a nursery in Jackson County, Oreg. on plants of threeyears of age. Color references are made using The Royal HorticulturalSociety (London, England) Colour Chart, 2001 except where common termsof color are used.

For a comparison, several physical characteristics of the rose variety‘KORpriggos’, a rose variety from the same inventor described andillustrated in U.S. Plant patent application No. 11/893,516 and filed onAug. 15, 2007 are compared to ‘KORcasima’ in Chart 1.

CHART 1 Characteristic ‘KORcasima’ ‘KORpriggos’ Flower color, Uppersurface: Red Upper surface: Orange-White ¼ open Group 53A. Lower sur-Group 159D. Lower surface, face: Red Group 53A. marginal zone: WhiteGroup 155D. Transitions to a large marginal zone of Yellow Group 2D.Petal count Very double, with 70-80 Double to very double, with petalson average. 45-50 petals on average.

-   Parents:    -   -   Seed parent.—An ‘un-named seedling’.        -   Pollen parent.—‘Insel Mainau’.-   Classification:    -   -   Botanical classification.—Rosa hybrida, ‘KORcasima’.        -   Commercial classification.—Shrub rose.

FLOWER AND FLOWER BUD

-   Blooming habit: Recurrent.    -   -   Flower bud.—Size: Upon opening, 20 mm in length from base of            receptacle to end of bud and 18 mm in diameter at its widest            point. Bud form: Short and globular. Bud color: As sepals            first unfold, bud color is Red Group 53A. When ¼ open, the            upper surface of petals is Red Group 53A, and the lower            surface of petals is Red Group 53A. Sepals: Size: Average 18            mm long×7 mm wide. Shape: Sepals generally subulate. Sepal            apex is generally cirrose. Weak foliaceous appendages on            three of the five sepals. Base is flat at union with            receptacle. Quantity: Five. Margins: With few stipitate            glands on outer surface. Surface texture: Inner side:            Covered in fine white hairs. Outer surface: Smooth. Color:            Upper surface Yellow-Green Group 144A and Yellow-Green Group            144B. Lower surface Yellow-Green Group 144A.        -   Receptacle.—Surface: Smooth. Color: Yellow-Green Group 145A.            Shape: Pear-shaped. Size: 6 mm (h)×6 mm (w).        -   Peduncle.—Surface: With stipitate glands. Length: 25–28 mm            average length. Diameter: 1.0–1.5 mm average diameter.            Color: Yellow-Green Group 145A. Strength: Strong. Borne:            Multiple buds per stem. 3–9 buds per flowering stem            Anthocyanin: Greyed-Red Group 178A.-   Flower bloom:    -   -   Fragrance.—Light.        -   Duration.—Long lasting. The blooms have a duration on the            plant of approximately 6 to 7 days. Senesced petals drop            away cleanly.        -   Size.—Medium to large flowered garden rose. When open, the            average flower diameter is 65–75 mm and the average flower            height is 35 mm.        -   Form.—Open flowers express quartered rosette shape. Shape of            flower when viewed from the side: Upon opening, upper part:            Flattened convex. Upon opening, lower part: Concave. Open            flower, upper part: Flattened convex — convex. Open flower,            lower part: Concave.-   Color:    -   -   Upon opening, petals.—Outermost petals: Outer Side: Red            Group 53B. Inner Side: Red Group 53A. Innermost petals:            Outer Side: Red Group 53B. Inner Side: Red Group 53A.        -   Upon opening, basal petal spots.—Basal petal spot, outermost            petals: Outer Side: Green-Yellow Group 1C. Inner Side:            Green-Yellow Group 1C. Basal petal spot, innermost petals:            Outer Side: Green-Yellow Group 1D. Inner Side: Green-Yellow            Group 1D.        -   After opening petals.—Outermost petals: Outer Side: Red            Group 53B. Inner Side: Red Group 46A. Innermost petals:            Outer Side: Red Group 53B. Inner Side: Red Group 53A.        -   After opening, basal petal spots.—Basal petal spot,            outermost petals: Outer Side: Green-Yellow Group 1C. Inner            Side: Green-Yellow Group 1C. Basal petal spot, innermost            petals: Outer Side: Green-Yellow Group 1D. Inner Side:            Green-Yellow Group 1D. Variegations: None.-   General tonality: On open flower Red Group 53A. No change in the    general tonality at the end of the 6th day. Afterwards, general    tonality is Red-Purple Group 60A.-   Petals:    -   -   Petal count.—Approximately 70–80 petals under normal            conditions.        -   Petal reflex.—Petals reflex slightly.        -   Petal edge.—Entire and smooth.        -   Petal shape.—Obovate. Apex shape is round. Shape of base is            acute.        -   Petal size.—25 mm long; 20 mm wide.        -   Thickness.—Thin.        -   Petal arrangement.—Generally in a regular pattern with            overlapping edges.-   Petaloids: Present.    -   -   Petaloid count.—Average of 2–5 per flower.        -   Petaloid edge.—Smooth.        -   Petaloid texture.—Smooth.        -   Petaloid shape.—Elongated. Entire. Shape of apex is round,            shape of base is pointed.        -   Petaloid size.—Petaloids are 4–5 mm long and 3–4 mm wide.        -   Petaloid color.—Color of inner side is Red Group 53A. Color            of outer side is Red Group 53A.-   Reproductive organs:    -   -   Pistils.—Approximately 35–40 present. Stigmas: Location:            Superior in position to anthers. Color: Greyed-Yellow Group            162D. Styles: Length: 6 mm long. Color: Green-Yellow Group            1B.        -   Stamens.—Approximately 10–15 on average and regularly            arranged. Anthers: Size: 2 mm long. Color: Yellow-Orange            Group 16B. Pollen: Absent. Filaments: Color: Green-Yellow            Group 1C. Length: 2–3 mm.

THE PLANT

-   -   -   Plant growth.—Vigorous. Bushy habit. When grown as a budded            nursery plant the average plant height is 70–80 cm and the            average plant width is 60–70 cm.        -   Stems.—Stem color: Young wood: Yellow-Green Group 144B.            Older wood: Yellow-Green Group 144B. Stem surface: Young            wood: Smooth. Older wood: Smooth.        -   Prickles.—Present. Incidence: 15–20 per 10 cm of stem. Size:            Average length: 8 mm. Color: Immature prickles: Yellow-Green            Group 146D. Mature prickles: Yellow-Green Group 146D.            Senescing to Greyed-Yellow Group 160B. Shape: Concave.            Anthocyanin: Greyed-Red Group 178A.        -   Leaves and leaflets.—Normally 5–7 leaflets on normal leaves            in middle of the stem. Venation pattern: Pyramidal net            pattern. Leaf size: 125 mm (l)×75 mm (w). Quantity: Average.            Texture: Upper side of leaflet: Glossy and smooth. Under            side of leaflet: Glossy and smooth. Color, mature foliage:            Upper Leaf Surface: Green Group 137A. Lower Leaf Surface:            Yellow-Green Group 148B. Color, juvenile foliage: Upper Leaf            Surface: Green Group 138A. Lower Leaf Surface: Yellow-Green            Group 148B. Anthocyanin intonation: Greyed-Purple Group            187A.        -   Stipules.—Size: 16 mm long. 7 mm between the tips of the            stipule. Main body of stipule 8 mm in width. Shape:            Longitudinally flanged or winged along middle. Stipule            color: Green Group 138A and Yellow-Green Group 145A.            Presence of stipitate glands: Present on margins. Margins:            Serrated. With stipitate glands and fine, white hairs.            Anthocyanin intonation: Greyed-Purple Group 183B.        -   Petiole.—Length: 11 mm. Diameter: 1.0 mm. Petiole color:            Green Group 138A. Underneath: An occasional prickle.            Stipitate glands: Present on margins. Petiole Rachis:            Length: 12–16 mm. Diameter: 1.0 mm. Color: Green Group 138A.            Margins: With stipitate glands. Prickles: An occasional            prickle underneath.        -   Leaflets.—Size: Average size of the terminal leaflet is 45            mm (l)×30 mm (w). Shape: Ovate. Base: Ovate. Apex: Acute            Margins: Serrated. Texture: Thick and leathery.

-   Hips / seed formation: None observed.

-   Winter hardiness: To date, the variety has been grown successfully    in Zone 5.

-   Disease resistance: Above average resistance to powdery mildew and    Black spot disease under normal growing conditions.

1. A new and distinct variety of rose plant characterized by thefollowing combination of characteristics: (a) Forms attractive, longlasting red flowers; (b) Exhibits bushy growth habit; (c) Propagateswell using traditional methods, and; (d) Exhibits very good resistanceto disease under normal growing conditions, substantially as hereinillustrated and described.